* 
328 Dr. Reuben on Moving Blood-corpuscles within the Retina. 
as I was already able to add some other and quite as sin- 
gular aspects of the phenomenon. Even before that date, I had 
also observed the appearance named in Prof. Rood’s second note 
(Nov. 1860), of the field of view resolving itself ‘‘ into a mass of 
small, round, densely packed moving bodies,” or rather into 
several currents of such, moving in different ways; and though 
without publishing it, had mentioned the fact before the Society 
above named, giving, however, a different method by which the 
appearance could be secured. 
color. The yellowish hue of the lines is not always apparent 
that, while this effect may, when present, —_ in intensifying 
or otherwise modifying the phenemenon, I am led to consider 
the true cause of the latter as to be sought in some effect of the 
